Call me the lazy one
I upgrde every couple of months from snapshots.
Just check the dates of both snapshot packages and binary packages to have them both available for a given date. Also watching misc@ for hints.
Or, when
http://openbsd.org/plus.html has an issue I am concerned with.
Anyway, the working secure OS is -current.
Release or -stable are badly chosen words.
If I am correct, to run postgresql 8.3, I need -current anyway.
Fwiw, I multiboot my production server. I only switch the snapshot to a newer one after a week-end's test on normal load.
Downtime is just limited to the speed of your hard drive.